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How to flush the DNS cache on a Mac (OSX)

By SK 1 comment Last updated August 15, 2012

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DNS requests are cached by storing the locations (IP addresses) of pages you viewed. You may wish to flush (meaning clear, reset, or erase) a DNS cache, especially if you’re a systems administrator or a web developer, so that you have the latest DNS data. Resetting your DNS cache in Mac OS X is actually really easy.

If you are using Mac OS X v10.6, you can use the dscacheutil command. To do this, open Terminal and type:

sudo dscacheutil -flushcache

If you are using OS X Mountain Lion or Lion:

sudo killall -HUP mDNSResponder

 

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